Magnetic disk drive
AssigneeHitachi Global Storage Technologies Japan, Ltd.
InventorNobumasa Nishiyama
Life of this patent
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Abstract
A magnetic disk drive having a two-stage actuator function and a TAF slider function comprises: signal superposing means 6 to reduce the number of transmission lines to be employed, by merging the control signal for a piezoelectric element 37 for the two-stage actuator function and the control signal for a heating resistor 38 for the TAF slider function into a single type of signal on preamplifier 26 side of the spring-load position; and signal separating means for separating the merged signal into the control signal for piezoelectric element 37 for the two-stage actuator function and the control signal for a heating resistor 38 for the TAF slider function on magnetic head 14 side of the spring-load position by use of interline crosstalk to control the respective functions.
Claims6
A magnetic disk drive including a magnetic head for writing/reading information to/from a magnetic recording medium and a preamplifier for exchanging read/write information with said magnetic head, said disk drive comprising:
- two or more types of control function units provided in said magnetic head;
- signal superposing means for merging two or more types of transmission lines into a single type of transmission line on the preamplifier side of a spring load position of a suspension, said two or more types of transmission lines transmitting control signals for said two or more types of control function units;
- and
- signal separating means for dividing said single type of transmission line into two or more types of transmission lines on the magnetic head side of said spring load position of said suspension.
A magnetic disk drive comprising:
- a magnetic recording medium;
- a magnetic head including
- a read element for reading information from said magnetic recording medium and providing read signals,
- a write element for writing information to said magnetic recording medium in response to write signals,
- a first control function unit, responsive to a first control signal, for effecting a first type of change in an operating characteristic of said magnetic head, and
- a second control function unit, responsive to a second control signal, for effecting a second type of change in an operating characteristic of said magnetic head;
- a suspension for supporting said magnetic head, said suspension having a spring load position;
- a transmission line segment spanning said spring load position;
- a signal superposition element that receives first and second signals and combines them to provide a combined signal directed along said transmission line segment spanning said spring load position toward said magnetic head;
- and
- a signal separation element on said suspension that
- receives said combined signal after said combined signal has traveled past said spring load position, and
- directs separate signals along first and second transmission line segments to said first and second control function units, respectively, to provide said first and second control signals.
Dependencies are inferred from the claim text.